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annotate libinterp/dldfcn/audioinfo.cc @ 19535:1f551d169db2

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Include config.h in audio project source files * libinterp/dldfcn/__player_audioplayer__.cc, libinterp/dldfcn/__recorder_audiorecorder__.cc, libinterp/dldfcn/audiodevinfo.cc, libinterp/dldfcn/audioinfo.cc, libinterp/dldfcn/audioread.cc, libinterp/dldfcn/audiowrite.cc, libinterp/dldfcn/player_class.cc, libinterp/dldfcn/recorder_class.cc: Include config.h before all other header files.
author Mike Miller <mtmiller@ieee.org>
date Tue, 01 Oct 2013 23:42:43 -0400
parents 8bb399569393
children 36a26a131209
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1 /*
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2
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3 Copyright (C) 2013 Vytautas Jančauskas
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #include "oct.h"
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28 #include "ov-struct.h"
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29 #ifdef HAVE_SNDFILE
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30 #include <sndfile.h>
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31 #endif
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32
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33 DEFUN_DLD(audioinfo, args, ,
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34 "-*- texinfo -*-\n\
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35 @deftypefn{Loadable Function} info = audioinfo(@var{filename})\n\
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36 \n\
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37 Return information about an audio file specified by @var{filename}.\
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38 \n\
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39 @end deftypefn"
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40 )
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41 {
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42 octave_scalar_map retval;
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43 if (args.length () != 1 || not args(0).is_string ())
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44 {
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45 print_usage ();
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46 return octave_value(retval);
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47 }
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48 #ifdef HAVE_SNDFILE
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49 Matrix audio;
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50 SNDFILE *file;
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51 SF_INFO info;
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52 info.format = 0;
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53 int start, end;
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54 file = sf_open(args(0).string_value ().c_str (), SFM_READ, &info);
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55 retval.assign ("Filename", args(0).string_value ());
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56 retval.assign ("CompressionMethod", "");
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57 retval.assign ("NumChannels", info.channels);
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58 retval.assign ("SampleRate", info.samplerate);
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59 retval.assign ("TotalSamples", info.frames);
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60 retval.assign ("Duration", (float)info.frames / (float)info.samplerate);
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61 int bits;
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62 if (info.format & SF_FORMAT_PCM_S8)
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63 {
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64 bits = 8;
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65 }
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66 else if (info.format & SF_FORMAT_PCM_U8)
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67 {
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68 bits = 8;
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69 }
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70 else if (info.format & SF_FORMAT_PCM_16)
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71 {
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72 bits = 16;
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73 }
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74 else if (info.format & SF_FORMAT_PCM_24)
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75 {
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76 bits = 24;
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77 }
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78 else if (info.format & SF_FORMAT_PCM_32)
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79 {
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80 bits = 32;
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81 }
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82 else
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83 {
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84 bits = -1;
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85 }
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86 retval.assign ("BitsPerSample", bits);
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87 retval.assign ("BitRate", -1);
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88 retval.assign ("Title", sf_get_string (file, SF_STR_TITLE));
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89 retval.assign ("Artist", sf_get_string (file, SF_STR_ARTIST));
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90 retval.assign ("Comment", sf_get_string (file, SF_STR_COMMENT));
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91 #else
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92 error("sndfile not found on your system and thus audioinfo is not functional");
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93 #endif
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94 return octave_value(retval);
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95 }